Do we eat dairy at night as well as the day?
The custom of eating dairy foods is only in the morning (i.e. lunch). On both nights we have a regular meat meal.
what is the origin for eating dairy foods?
dear Morris
first Ta'am (reason) for eating dairy foods is because it is Hag Mattan Tora and about the Tora the Pasuk says: Devash Vehalav Tahat Leshoneck.
second Ta'am is because after the people of Israel received the Tora at Har Sinai they were hungry but they didn't have a kosher Kelim (to cook in it) until they make Hag'ala and Tevila to their Kelim, so they could eat only diary food.
Tizku Leshanim Rabboth
Haim Salman
Jerusalem Israel